# The Secret of Prime Numbers

What is Prime Numbers ? Take a look to the diagram 1 beside this article, can you tell which number is Prime Number ? Is number 1 a Prime Number ? How to identify all the Prime Number from Number 1 to 100 ?

To make it simple, Prime Numbers is numbers that only can **divide by number 1** and **itself**. Under this circumstances, few assumptions are made as below :

- The number -
**one (1)**is no a Prime Number. - Prime Numbers
**begin**with the number -**two (2).** **All**even numbers are**not**Prime Numbers**except**number -**two (2)**- The number that
**ended**with number -**five (5)**is not Prime Numbers**except**number -**five (5)**. For example : 15, 25, .... - The
**multiples**of number -**three (3)**is**not**Prime Numbers**except**number -**three (3)**. For example : 9, 21, ...

**25**Prime Numbers from the range 1 - 100. The first Prime Number is number two and the last number is ninety-seven.

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